Influence of stirrup spacing in concrete column on its dynamic characteristics

Changes in natural frequencies, modal shapes, and damping ratios of a two story single span reinforced concrete building having different stirrup spacing in columns are analysed in the paper. Two building models measuring 150 x 150 x 135 cm were manufactured for the testing. Dynamic properties of both buildings were experimentally determined using the operational modal analysis. The ABAQUS finite element software was used to numerically determine dynamic properties of the buildings. The effect of stirrup densification in columns on dynamic properties of the building was defined by comparing experimental and numerical analysis results